1.拷贝tags字段名內容到keyboard，当keyboard为空的情况下：

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard=a.infotags where a.id=b.id and b.keyboard='';

2.加上tags字段名內容到keyboard：

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard=concat(b.keyboard,',',a.infotags) where a.id=b.id and b.keyboard<>'' and a.infotags<>'';

3.假如副表中keyid（有关连接）字段名为空，表明keyboard设定不科学，果断清除，为全自动词性标注铲除阻碍

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.keyboard='' where a.i唐山市关键词排名d=b.id and a.keyid=''

4.newstext在副表，获取第一张照片为标题图片。当标题图片为空的情况下。

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext, '.jpg', 1),'src=',-1),'"',''),'.jpg') where a.newstext like '%.jpg%' and b.titlepic='' and a.id=b.id;

update [!db.pre!]ecms_news_data_1 a, [!db.pre!]ecms_news b set b.titlepic=concat(replace(SUBSTRING_INDEX(SUBSTRING_INDEX(a.newstext, '.gif', 1),'src=',-1),'"',''),'.gif') where a.newstext like '%.gif%' and b.titlepic='' and a.id=b.id;

文章内容转自：黎苍松SEOblog

来源于详细地址：http://www.alitaohuo.com/CMSjiaocheng/diguojiaocheng/1685.html